diff --git a/internal/distributed/querycoord/client/client.go b/internal/distributed/querycoord/client/client.go
index 00f6f9f6e8..2bfa243a49 100644
--- a/internal/distributed/querycoord/client/client.go
+++ b/internal/distributed/querycoord/client/client.go
@@ -354,6 +354,7 @@ func (c *Client) LoadPartitions(ctx context.Context, req *querypb.LoadPartitions
 	return ret.(*commonpb.Status), err
 }
 
+// ReleasePartitions release the data of the specified partitions in the QueryCoord.
 func (c *Client) ReleasePartitions(ctx context.Context, req *querypb.ReleasePartitionsRequest) (*commonpb.Status, error) {
 	ret, err := c.recall(func() (interface{}, error) {
 		client, err := c.getGrpcClient()